Higher mathematics
[计] 高等数学
🧩 词语组成解析
[经] 上扬
🗣️ 情景例句
Safety first.
安全第一。
Slow and steady wins the race.
跛鳖千里。
An advertisement which begins with the magic word FREE can rarely go wrong.
凡是用“免费”这个神奇的词开头的广告很少会失败的。